Board Thread:General Discussion/@comment-32184785-20170625000539/@comment-6045829-20170823031748

If you're talking about Adventure Mode then any starter works.

If you want a competitive point of view: -I agree with Charizard and Venusaur. Note that another good alternative grass type would be Serperior, quite a decent pokemon with access to leech seed. -Water type starters are really, really terribly average, and if you want a water type you'll normally catch one then use the starter. Gyarados, Manaphy are some examples and there are much more better water types.